Hormone (Adj. Hormonal)

A chemical “messenger” which is made and secreted by an endocrine gland and which targets one or more parts of the body, modifying its structure or changing the way it works. Hormones are chemical substances having a specific regulatory effect on the...

Hormone Replacement Therapy

The name given to a form of treatment in which missing or deficient hormones can be replaced, the body being encouraged to behave normally as if it were making the hormones naturally. Doses are designed to mimic normal blood levels and vary depending on the...

Hydrocephalus

A condition marked by an excessive accumulation of fluid resulting in enlarging of the brain cavities and raised pressure within the skull; may also result in enlargement of the skull and wasting of the brain. The abnormal buildup of cerebrospinal fluid in the...